Type 1 And Type 2 Cable - Andrew 8212 User Manual

•
Maximum attenuation per 1000 feet for level 4
— 5.00 dB at 1 MHz
— 22.00 dB at 16 MHz
NOTE:
Commonly available consumer telephone cable, sometimes called
"flat cable" or "silver satin," should not be used. This type of cable
can drastically reduce the cable lengths possible in your network.
Exceptions to this are the patch cables used to connect MAUs in the
same wiring closet in 4 Mbps networks; they may be made of this
type of cable, but they should be no more than three feet in length. In
16 Mbps networks, however, silver satin of any length should not be
used.
Electrical Interference
Because Type 3 cable is unshielded, care must be taken to avoid areas of
electrical disturbance. Some examples of sources of electrical disturbance
are:
•
Fluorescent lights
•
Power cables
•
Electric motors
•
Radio transmitters.

Type 1 and Type 2 Cable

Type 1 is the IBM Cabling System term for shielded twisted pair (STP)
data cable. It consists of two twisted pairs of 22 AWG solid conductor
wire enclosed in a tinned copper braid shield, and it's covered with an
appropriate sheath. The sheath material varies according to whether or not
the cable will be used in an environmental air duct. There is also a variety
of Type 1 for outdoor use.
Type 2 cable is the same as Type 1 cable in that it has two shielded
twisted pairs of 22 AWG wire for data communication. It differs from
Type 1 in that the cable sheath also contains four twisted pairs of
unshielded 22 AWG solid conductor wire for telephones.
Hardware
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